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(-)-Methyl(4R, 5S 10R)-14-methoxypodocarpa- 8, 11, 13 -triene -19 -oate(1), which is the key intermediate for synthesis of diterpenoids, was synthesized from (R)- (+) -2 -methyl -2 -(2-nitrovinyl)-δ-valerolactone(2).